W91530N datasheet(4/19 Pages) WINBOND

Part #	W91530N

Description	13-MEMORY TONE/PULSE DIALER WITH SAVE, KEYTONE, LOCK,AND HANDFREE FUNCTION

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W91530N SERIES

- 4 -

Pin Description, continued

SYMBOL

18-PIN

20-PIN

I/O

FUNCTION

LOCK

5

(only for

W91531LN)

5

(only for

W91531ALN)

I

The function of this terminal is to prevent "0" dialing and

"9" dialing under PABX system long distance call

control. When the first key input after reset is 0 or 9, all

key inputs, including the 0 or 9 key, become invalid and

the chip generates no output. The telephone is

reinitialized by a reset.

The function of the LOCK pin is shown below:

LOCK PIN

FUNCTION

VDD

VSS

Floating

"0", "9" dialing inhibited

Normal dialing mode

"0" dialing inhibited

DP / C5

11

13

O

N-channel open drain dialing pulse output.

Flash key will cause DP to be active in either tone mode

or pulse mode.

In lock mode, the DP remains low for 300 mS during off-

hook delay time.

The timing diagram for pulse mode is shown in Figure

1(a, b, c, d).

DTMF

12

14

O

During pulse dialing, this pin remains in low state

regardless of keypad input. In tone mode, it will output a

dual or single tone.

A detailed timing diagram for tone mode is shown in

Figure 2(a, b, c, d).

R1

R2

R3

R4

C1

C2

C3

Specified

697

770

852

941

1209

1336

1477

699

766

848

948

1216

1332

1472

Actual

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

Error %

OUTPUT FREQUENCY

VDD, VSS

14, 6

16, 6

I

Power input pins for the dialer chip. VDD is the main

power and VSS is the ground.

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